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Teres Minor Origin
superior part of the lateral scapula
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Teres Minor Insertion
greater tuberosity on the inferior facet
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Teres Minor Innervation
Axillary Nerve
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Teres Minor action
lateral rotation
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Infraspinatus Origin
Infraspinous fossa
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Infraspinatus insertion
greater tuberosity on the medial facet
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Infraspinatus Innervation
Suprascapular Nerve
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Infraspinatus Action
lateral rotation
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Serratus Anterior Origin
Upper 8 ribs
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Serratus Anterior Insertion
anterior surface of the medial border of the scapula
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Serratus Anterior Innervation
Long thoracic nerve
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Serratus Anterior Action
protraction and upward rotation of the scapula
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Supraspinatus Action
Abduction and Stabilizes the humerus position
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Triangular Interval Boundaries
- Lateral: lateral head of the triceps
- medial: long head of the triceps
- Superior: teres major
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Triangular Interval Contents
- Radial Nerve
- Profundu Brachial Artery
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Supraspinatus Origin
Supraspinous Fossa
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Supraspinatus Insertion
greater tuberosity on the superior facet
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Supraspinatus Innervation
Suprascapular Nerve
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Triangular Space Boundaries
- Superior: Teres Minor
- Inferior: Teres Major
- Lateral: Long head of the triceps
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Triangular Space Contents
Circumflex Scapular Artery
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Quadrangular Space boundaries
- Superior: Teres Minor
- Inferior: Terse Major
- Lateral: humerus
- Medial: long head of the triceps
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Quadrangular Space Contents
- Axillary Nerve
- Posterior Circumflex Humeral Artery
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Suprascapular Nerve and Artery
- join near scapular notch
- nerve passes through notch near suprascapular ligament
- artery enters posterior by passing superficial to suprascapular ligament
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Clavicle function
- transmit force from appendicular skeleton to axial
- muscle attachment
- Allow free motion of upper limb
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Suprascapular Artery Supplies:
- Supraspinous fossa, infraspinous fossa
- Anastomoses with circumflex scapular artery and dorsal scapular artery
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What is the spiral groove on the humerus
sulcus for the radial nerve
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What arch is formed by the acromion
subacromial arch
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What is the spot between the manubrium and body of the sternum called
Angle of Louie
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What is the triangle made up of the clavicle, deltoid and pectoralis major called
clavipectoral triangle or deltopectoral triangle
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Axilla Boundaries
- Medial: serratus anterior
- Anterior: pectoralis major and minor
- Posterior: latissimus dorsi, subscapularis, teres major
- Lateral: humerus, coracobrachailis, long head of biceps
- Apex: clavicle, superior border of scapula, ist rib
- Base: axillary fascia
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Axilla distribution
- Superiorly: cervical axillary canal
- Posteriorly: quadrangular space
- Anteriorly: claviopectoral triangle
- Inf/ Lat: base of axilla
- Inf/ Med: along thoracic wall
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Where does the axillary artery become the axillary artery?
after the 1st rib and before teres major
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What is the axillary artery before and after?
- Before: subclavian
- After: Brachial
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Teres Major Origin
dorsal surface of inferior angle of scapula
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Teres major insertion
medial lip of intertubercle groove
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Teres Major Innervation
Lower Subscapular Nerve
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Teres major Action
- Extension
- Medial Rotation
- Adduction
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Deltoid Origin
lateral third of clavicle, acromion, spine of scapula
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Deltoid Insertion
Deltoid Tuberosity
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Deltoid Innervation
Axillary Nerve
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Deltoid Action
flexion, extension, abduction, internal rotation, external rotation
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Pectoralis Major Origin
clavicle sternum, aponeurosis of external oblique
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pectoralis Major insertion
lateral lip of intertubercle groove
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Pectoralis Major Innervation
Medial and Lateral Pectoral Nerve
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Pectoralis Minor Origin
Ribs 3-5
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Pectoralis Minor Insertion
Coracoid Process
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Pectoralis Minor action
stabilizes scapula against thoracic wall
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Pectoralis Minor Innervation
Medial Pectoral Nerve
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Subclavius Origin
1st rib and costal cartilage
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Subclavius Insertion
inferior surface of middle 1/3 of clavicle
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Subclavius Innervation
Nerve to subclavius
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Subclavius Action
Anchors and depresses clavicle
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Subscapularis Action
Internal Rotation
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Subscapularis Innervation
Lower and Upper Subscapular Nerves
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Subscapularis Origin
Scapular Fossa
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Subscapularis Insertion
Lesser tuberosity
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